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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8534A датащи(PDF) 16 Page - NXP Semiconductors |
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PCF8534A датащи(HTML) 16 Page - NXP Semiconductors |
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16 / 52 page  PCF8534A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 6 — 25 July 2011 16 of 52 NXP Semiconductors PCF8534A Universal LCD driver for low multiplex rates 7.4.4 1:4 Multiplex drive mode When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as shown in Figure 11. Vstate1(t) = VSn(t) VBP0(t). Von(RMS) = 0.577VLCD. Vstate2(t) = VSn(t) VBP1(t). Voff(RMS) = 0.333VLCD. Fig 11. Waveforms for the 1:4 multiplex drive mode with 1⁄3 bias 013aaa211 state 1 BP0 (b) Resultant waveforms at LCD segment. LCD segments state 2 BP1 state 1 state 2 BP2 (a) Waveforms at driver. BP3 Sn Sn+1 Sn+2 Sn+3 Tfr VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 0 V VLCD 2VLCD/3 -2VLCD/3 VLCD/3 -VLCD/3 -VLCD 0 V VLCD 2VLCD/3 -2VLCD/3 VLCD/3 -VLCD/3 -VLCD VSS VLCD 2VLCD/3 VLCD/3 |
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